Hopkins, Alan R. and Lewis, Nathan S. (2001) Detection and Classification Characteristics of Arrays of Carbon Black/Organic Polymer Composite Chemiresistive Vapor Detectors for the Nerve Agent Simulants Dimethylmethylphosphonate and Diisopropylmethylphosponate. Analytical Chemistry, 73 (5). pp. 884-892. ISSN 0003-2700. doi:10.1021/ac0008439. https://resolver.caltech.edu/CaltechAUTHORS:20160727-095127275
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Abstract
Arrays of conducting polymer composite vapor detectors have been evaluated for performance in the presence of the nerve agent simulants dimethylmethylphosphonate (DMMP) and diisopropylmethylphosponate (DIMP). Limits of detection for DMMP on unoptimized carbon black/organic polymer composite vapor detectors in laboratory air were estimated to be 0.047−0.24 mg m^(-3). These values are lower than the EC_50 value (where EC_50 is the airborne concentration sufficient to induce severe effects in 50% of those exposed for 30 min) for the nerve agents sarin (methylphosphonofluoridic acid, 1-methylethyl ester) and soman (methylphosphonofluoridic acid, 1,2,2-trimethylpropyl ester), which has been established as ∼0.8 mg m^(-3). Arrays of these vapor detectors were easily able to resolve signatures due to exposures to DMMP from those due to DIMP or due to a variety of other test analytes (including water, methanol, benzene, toluene, diesel fuel, lighter fluid, vinegar, and tetrahydrofuran) in a laboratory air background. In addition, DMMP at 27 mg m^(-3) could be detected and differentiated from the signatures of the other test analytes in the presence of backgrounds of potential interferences, including water, methanol, benzene, toluene, diesel fuel, lighter fluid, vinegar, and tetrahydrofuran, even when these interferents were present in much higher concentrations than that of the DMMP or DIMP being detected.
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| Additional Information: | © 2001 American Chemical Society. Published on Web 02/28/2001; Received for review July 26, 2000; Accepted December 8, 2000. We acknowledge the Department of Energy (DE-FG03-98NV13367), the Army Research Office through a MURI (DAAG55-98-1-0266), and DARPA (DAAK-60-97-K9503) for support of this work. We also acknowledge helpful discussions with V. George of the Army Night Vision Laboratory regarding detection limits and background ambients of interest. | |||||||||
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| Issue or Number: | 5 | |||||||||
| DOI: | 10.1021/ac0008439 | |||||||||
| Record Number: | CaltechAUTHORS:20160727-095127275 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20160727-095127275 | |||||||||
| Official Citation: | Detection and Classification Characteristics of Arrays of Carbon Black/Organic Polymer Composite Chemiresistive Vapor Detectors for the Nerve Agent Simulants Dimethylmethylphosphonate and Diisopropylmethylphosponate Alan R. Hopkins and Nathan S. Lewis Analytical Chemistry 2001 73 (5), 884-892 DOI: 10.1021/ac0008439 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 69241 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Jason Perez | |||||||||
| Deposited On: | 27 Jul 2016 17:06 | |||||||||
| Last Modified: | 11 Nov 2021 04:11 |
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